I have an instrument mounted on the nozzle of a vessel and have assigned
the bolts from the pipe spec. The bolts do not show up on the ISO. Has
anyone encountered this problem before? Is the problem because the nozzle has no flange? Will adding the bolts to the instrument spec solve the problem? If so is this the best solution or is there a better way?:redface:
Generally speaking when using old bolting, Nozzles do not have a bolt reference as we have mentioned before on the site.
You can make sure the instrument speco has a bltref and include the correct bolt in your instrument spec. But I believe that the bolt at the nozzle will still be missing.
The way old bolting works is that isodraft calculates the length of the bolt by taking Half the length of the boltref for the first component, half the length of the boltref for the second component and adding the two halves together to get the total length of the required bolt. (Plus the length of any wafer fittings)
As the Nozzle has no boltref in the spec, the calculation cannot be completed. Hence no bolt.
With New Bolting the calculation is different and uses the Nozzle BLTREF set in the CATREF